Name of State Highways Across 50 U.S. States (plus the District of Columbia and Territories)

Apr 12, 2026

"State Road"

• Florida
• Indiana
• New Mexico

"State Route"

• Alabama
• Arizona
• California
• Georgia
• Maine
• Nevada
• New York
• Ohio
• Tennessee
• Utah
• Virginia
• Washington

"Highway"

States

• Arkansas
• Iowa
• Louisiana
• Mississippi
• Montana
• Nebraska
• North Carolina
• North Dakota
• South Carolina
• South Dakota
• Wyoming

Territories

• American Samoa
• Guam
• Northern Mariana Islands
• Puerto Rico
• U.S. Virgin Islands

"State Highway"

• Colorado
• Idaho
• Minnesota
• Oklahoma
• Texas

"Route"

States

• Alaska
• Connecticut
• Delaware
• Hawaii
• Illinois
• Kentucky
• Maryland
• Massachusetts
• Missouri
• New Hampshire
• New Jersey
• Oregon
• Pennsylvania
• Rhode Island
• Vermont
• West Virginia

Federal district

• District of Columbia

"M-nn" / "K-nn" (first letter of state name followed by a number)

• Michigan
• Kansas

"State Trunk Highway"

• Wisconsin

Which U.S. states use the term "State Road"?

Florida, Indiana, and New Mexico.

How many U.S. states use the term "State Route"?

There are 12 states use the term "State Route", including Alabama, Arizona, California, Georgia, Maine, Nevada, New York, Ohio, Tennessee, Utah, Virginia, and Washington.

Which states and territories use “Highway”?

The term "Highway" is used by Arkansas, Iowa, Louisiana, Mississippi, Montana, Nebraska, North Carolina, North Dakota, South Carolina, South Dakota, and Wyoming, plus the territories of American Samoa, Guam, Northern Mariana Islands, Puerto Rico, and U.S. Virgin Islands.

Which U.S. state use the term "State Highway"?

Colorado, Idaho, Minnesota, Oklahoma, and Texas.

How many states use the term "Route"?

There are 16 states and 1 federal district use the term "Route", including Alaska, Connecticut, Delaware,Hawaii, Illinois, Kentucky, Maryland, Massachusetts, Missouri, New Hampshire, New Jersey, Oregon, Pennsylvania, Rhode Island, Vermont, West Virginia, and the District of Columbia.

Which states use letter-number formats (e.g., A-nn, B-nn)?

Michigan (M-nn) and Kansas (K-nn).

Which state uses the term "State Trunk Highway"?

Wisconsin is the only state using the term "State Trunk Highway".

Which highway naming style is the most commonly used across U.S. states?

The most commonly used highway naming style is "Route," used by 16 states plus the District of Columbia.

What are the main naming categories overall?

"State Road", "State Route", "Highway", "State Highway", "Route", Letter-number systems ("M-nn", "K-nn"), and "State Trunk Highway".